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Finding the Fourth Proportional to 490,090.40, 735,135.60 and 407,146.40

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Solution

The fourth proportional to 490,090.40, 735,135.60 and 407,146.40 is: 610,719.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,090.40 : 735,135.60 = 407,146.40 : x
  2. Step 2: Convert to fraction form
    490,090.40/735,135.60 = 407,146.40/x
  3. Step 3: Cross multiply
    490,090.40x = 735,135.60 × 407,146.40
  4. Step 4: Simplify right side
    490,090.40x = 299,307,813,051.84
  5. Step 5: Solve for x
    x = 299,307,813,051.84/490,090.40
  6. Step 6: Final answer
    x = 610,719.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.